Connected: An Internet Encyclopedia
RFC 1042 - IEEE 802.4 Details

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### IEEE 802.4 Details

The MAC header contains 1 octet of frame control, 6 (2) octets of source address, and 6 (2) octets of destination address. The MAC trailer contains 4 octets of Frame Check Sequence (FCS), for a total of 17 (9) octets.

IEEE 802.4 networks have no minimum packet size.

IEEE 802.4 networks have a maximum packet size of 8191 octets including all octets between the frame control and the FCS inclusive.

This allows 8191 - 17 (MAC header+trailer) - 8 (LLC+SNAP header) = 8166 for the IP datagram (including the IP header).

Next: IEEE 802.5 Details

Connected: An Internet Encyclopedia
RFC 1042 - IEEE 802.4 Details